A long word deliberately coined to be longest word in the English language. It comes in at 45 letters, much longer than supercalifragilisticexpialidocious which is only 34. It is still quite a large number, but pales in comparison to the 45 that pneumonoultramicroscopicsilicovolcanoconiosis holds. It's a lung disease that you get by inhaling smoke or ash, which presumably leads to the "volcano" in the name of the word.
Sir, I'm afraid you've been diagnosed with a severecase of pneumonoultramicroscopicsilicovolcanoconiosis.
pneumonoultramicroscopicsilicovolcanoconiosis refers to a phenomenon in which a ultra microscopic volcano gets infected by pneumonia due to excess amount of sillicon in its diet. It maysneeze too that causes the volcano to erupt. It has been verified by scientists that pneumonoultramicroscopicsilicovolcanoconiosis is one of the major reasons for volcanic eruptions.
thats a heck of a long word:
pneumonoultramicroscopicsilicovolcanoconiosis